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Radiation Dose Audit Reports to Reduce Radiation Exposure From CT Exams

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ClinicalTrials.gov Identifier: NCT01405066
Recruitment Status : Completed
First Posted : July 29, 2011
Last Update Posted : February 17, 2022
University of California, San Francisco
Information provided by (Responsible Party):
Kaiser Permanente

Brief Summary:

The purpose of this study is to quantify variation in radiation dose levels across CT technologists, and determine the effectiveness of combining radiation dose audit reports and an educational seminar as a means to reduce the variation and level of patient exposure to radiation.

The investigators expect the radiation dose audit reports and educational seminar will lead to reduced radiation exposure to patients by making technologists more aware of the risks of radiation exposure from CT exams and identifying technologists with higher radiation exams compared with their peers.

The investigators expect the degree to which a technologist is concerned and aware about radiation exposure and cancer risk will be associated with adherence to radiation reduction protocols and the subsequent level of radiation their patients are exposed to when receiving a CT examination.

Condition or disease Intervention/treatment Phase
Decrease Variability and Amount of Radiation Dose From CT Exams Behavioral: Radiation Dose Audit Reports Behavioral: Educational Seminar: Radiation Dose Reduction Not Applicable

Detailed Description:
The use of advanced diagnostic imaging has increased dramatically over the past decade, not only contributing to rising medical costs but also exposure to ionizing radiation, of which CT imaging plays a prominent role because it requires a relatively high dose of radiation to produce an image when compared to conventional X-rays. The growth in the use of CT imaging along with all other advanced medical imaging has been well documented, and taken as a whole the use of these services has grown quicker than all other services provided by physicians. Research has also shown great variability in the amount of radiation exposure to individual patients, even when patient and other characteristics are controlled for. Given the increase in the use of CT imaging and the variability in radiation exposure between similar imaging exams, it is important to study ways of standardizing and reducing radiation levels from CT imaging. Little is understood about the role of CT technologists' attitudes and how they may influence patient radiation exposure, therefore, this project also give us the opportunity to survey the technologists and determine if there is a relationship between technologist attitudes and awareness and the radiation exposure of patients.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 19 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Health Services Research
Official Title: CT Technologists Dose Audit Reports and Educational Seminar to Reduce Patient Radiation Exposure From Medical Imaging
Study Start Date : November 2010
Actual Primary Completion Date : September 2014
Actual Study Completion Date : September 2014

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: Dose Reports and Educational Seminar Behavioral: Radiation Dose Audit Reports
Audit reports by CT technologist, with graphs of radiation dose levels of 20 exams from each of the 4 most common CT exams. Reports show the distribution of radiation dose levels by each exam type, and compares the technologist's dose levels to the overall levels from the clinic where they work and to the United Kingdom's 2003 Reference Dose. Prior to the graphs, the reports include an introductory page explaining the organization of the report and defining the dosimetry metrics. The final page of the report lists exams meriting individual review because their doses are higher than that of the clinic averages.

Behavioral: Educational Seminar: Radiation Dose Reduction
Seminar led by a Radiologic Physicist and Radiologist. Discussion of the parameters associated with radiation dosage from CT exams and methods for changing these parameters to lower radiation dose.

Primary Outcome Measures :
  1. Radiation dose levels (measured by dose linear product (DLP) and effective dose (ED)) from CT exams as a measure of the effectiveness of radiation dose audit reporting and educational intervention for lowering patient exposure to radiation from CT exams. [ Time Frame: April 2011 and September 2011 ]
    We will report dose data at two time points, April 2011 (data for these reports collect from November 2010 to March 2011), and September 2011 (data collected from April 2011 to August 2011), and compare the data from the two time points to see if there was a change in dose levels (DLP and ED) for the time period (April to August) after the presentation of the first audit reports and delivery of the educational interventions to the CT technologists.

Secondary Outcome Measures :
  1. CT Tech technologists attitudes and awareness towards radiation exposure from CT imaging [ Time Frame: April 2011 to September 2011 ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Group Health CT Technologist from Capitol Hill, Tacoma and Bellevue Clinics

Exclusion Criteria:

  • None

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01405066

Sponsors and Collaborators
Kaiser Permanente
University of California, San Francisco
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Principal Investigator: Diana Miglioretti, PhD Group Health Research Institute
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Responsible Party: Kaiser Permanente
ClinicalTrials.gov Identifier: NCT01405066    
Other Study ID Numbers: GroupHealthCoop Foundation2011
First Posted: July 29, 2011    Key Record Dates
Last Update Posted: February 17, 2022
Last Verified: February 2022
Keywords provided by Kaiser Permanente:
Computed Tomography (CT)
Ionizing radiation
Advanced medical imaging
Radiation Dose Audit Reports